/*
 * Copyright 2006 - Chris Maki
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.theserverside.blog.listener;

import java.util.Date;

import javax.persistence.PrePersist;

import com.theserverside.blog.model.ModelBase;
import com.theserverside.blog.model.User;
import com.theserverside.blog.model.UserUtil;

public class ModelListener {
    
    @PrePersist
    public void setDatesAndUser(ModelBase modelBase) {

        // set createdBy and updatedBy User information
        User currentUser = UserUtil.getCurrentUser();
        
        // check to see if modelBase and currentUser are the same, if so, make
        // currentUser modelBase.
        if (modelBase.equals(currentUser)) {
            currentUser = (User) modelBase;
        }
        
        if (currentUser != null) {
            if (modelBase.getCreatedByUser() == null) {
                modelBase.setCreatedByUser(currentUser);
            }
            modelBase.setUpdatedByUser(currentUser);
        }

        // set dateCreated and dateUpdated fields
        Date now = new Date();
        if (modelBase.getDateCreated() == null) {
            modelBase.setDateCreated(now);
        }
        modelBase.setDateUpdated(now);

    }
}
